Product Overview

The L4-BTE-P is a 4 channel digital BTE hearing aid developed for hearing aid distributors, audiology clinics, hearing centers, medical device importers and professional hearing care organizations that need a clearly documented starting configuration in the L-BTE-P family.

The model provides 4 independently adjustable compression and amplification channels, 8 independently adjustable bands and 16 DSP channels on the ACOD2101 intelligent multi-core DSP platform.

Its electroacoustic profile includes a maximum OSPL90 of 128 dB, HFA OSPL90 of 116 dB, maximum FOG50 of 51 dB and HFA FOG50 of 41 dB. Target and measured reference test gain are both specified at 41 dB, while the frequency range is 200–5500 Hz.

The signal-processing configuration includes ERAC 1.0 Context Analysis Based Intelligent Multi-Compression Technology with a Dual-Knee structure, AFC 2.0 Adaptive Feedback Cancellation with two levels, SIW technology and ENDR 1.0 Environment Detection and Noise Reduction specified at up to 15 dB.

For B2B buyers, L4-BTE-P serves as a transparent baseline model that can be evaluated through fitting capacity, DSP structure, documented electroacoustic values and professional fitting functions rather than broad consumer-oriented claims.

Electroacoustic Baseline of the L-BTE-P Range

One of the central characteristics of L4-BTE-P is its documented electroacoustic profile.

The model provides:

• Maximum OSPL90: 128 dB
• HFA OSPL90: 116 dB
• Maximum FOG50: 51 dB
• HFA FOG50: 41 dB
• RTG Target: 41 dB
• RTG Measured: 41 dB
• Frequency Range: 200–5500 Hz
• Battery Current: 1.4 mA
• EQ: 25 dB

For distributors, these values provide concrete reference points for technical sheets, quotation preparation, sample evaluation and portfolio comparison.

For hearing centers and audiology clinics, the same data can be reviewed alongside fitting-channel configuration when evaluating the model for a professional product program.

For buyers considering a 4 channel digital BTE hearing aid, this specification-led approach makes it possible to compare models through documented technical data instead of relying on generalized tier labels.

4 / 8 / 16 Fitting Configuration

L4-BTE-P uses a straightforward 4 / 8 / 16 architecture:

• 4 independently adjustable compression and amplification channels
• 8 independently adjustable bands
• 16 DSP channels

The structure gives fitting teams defined adjustment points while keeping the product easy to position at the starting level of the series.

For distributors, the numerical structure is useful in catalog organization and technical training because it creates an immediate reference for progression to L8-BTE-P, L12-BTE-P and L16-BTE-P.

A 4 channel digital BTE hearing aid with this architecture can therefore be positioned as a clearly specified entry configuration within a broader BTE portfolio.

Core Processing Configuration

The compression platform uses ERAC 1.0 with a Dual-Knee structure.

Feedback management is provided by AFC 2.0 Adaptive Feedback Cancellation with two levels, together with SIW technology.

Noise reduction is provided by ENDR 1.0, specified at up to 15 dB.

The Directional Dual-Microphone mode is specified as All Direction. Directional Speech Enhancement is not included.

Environment Recognition, Noise Source Tracking and Suppression, dedicated Transient Noise Management and Wind Noise Management are also not included at this model level.

These clearly defined boundaries help professional buyers distinguish L4-BTE-P from the higher configurations without introducing unsupported performance claims.

Professional Fitting and Device Functions

L4-BTE-P provides 4 selectable programs and includes an Internal Sound Field Assessment System and Internal Audiometer System.

Additional functions include:

• Adjustable Turn-on Delay
• Occlusion Effect Management
• Low Battery Power Notification
• Adjustable Notification Volume
• Volume Control
• FM Interface Compatibility
• Auto Phone Function
• Memory After Power-off
• Standard Personalized Data Storage
• Nano Coating Technology

These functions give clinics and distributor-led hearing care programs a defined professional operating specification in addition to the product's fitting and electroacoustic data.

Role in a Tiered BTE Portfolio

L4-BTE-P is best positioned as the technical baseline of the L-BTE-P family.

Its key reference points are 4 fitting channels, 8 adjustable bands, 16 DSP channels, 128 dB maximum OSPL90, AFC 2.0 feedback management, ENDR 1.0 up to 15 dB and an All Direction microphone configuration.

The progression to higher models can then be explained through verified technical changes.

L8-BTE-P increases fitting capacity and introduces Fixed Direction processing. L12-BTE-P introduces Standard Environment Recognition, Noise Source Tracking and Suppression, Wind Noise Management and ENDR 2.0. L16-BTE-P increases fitting and DSP capacity within that upper processing tier.

This makes L4-BTE-P suitable for distributors that want a clearly structured family in which every SKU has an identifiable technical role.

Technical Specifications

FAQ

How many fitting channels does L4-BTE-P provide?

It provides 4 independently adjustable compression and amplification channels, 8 adjustable bands and 16 DSP channels.

What are the main electroacoustic specifications?

Maximum OSPL90 is 128 dB, HFA OSPL90 is 116 dB, maximum FOG50 is 51 dB and HFA FOG50 is 41 dB. The frequency range is 200–5500 Hz.

Which feedback technology is included?

AFC 2.0 Adaptive Feedback Cancellation with two levels is included together with SIW technology.

What microphone mode is specified?

Directional Dual-Microphone Technology is specified as All Direction.

Are FM Interface Compatibility and Auto Phone Function supported?

Yes. Both functions are supported.

Contact AcoSound

Looking for a 4 channel digital BTE hearing aid for your professional product portfolio?

Contact AcoSound for L4-BTE-P specifications, samples and B2B project information.